Yes, very sorry to hear your suspicions were correct. Having been through that I know firsthand how awful it feels. Just remember you're fine, you'll continue to be fine and everything will be alright.
Funny though, if you had gone the route I suggested her friend and husband would have no idea what you were talking about and that would've been very interesting indeed.
Keep your chin up, remember once a cheater, always a cheater. Don't get suckered into being a sucker.